The daily said Google was in the early stages of development of the app, which will not make it mandatory to use a Google login.
If launched, the mobile app will compete in the mobile chat space with the likes of WhatsApp, Line and Hike.
The Mountain View, California-based company is also looking at localization, by adding Indian language support and voice-to-text messaging, the newspaper said.
A Google spokeswoman said the company did not comment on speculation. – Reuters